I want to get a new Net Flux that will only print the values that are LESS than 30 from the "Net Flux" of "MAG_1"?

In 1]: In [94]; if(np.any (sources1['Net Flux'] > 0)): Mag_1 = -2.5*np. log10(sources1['Net Flux')) + 20.0 print (Mag_1) Net Flux 20.466405 15.837174 40 17.023643 17.777022 16.999826 17.092647 18.403429 40 20 20.139578 40 18.024449 17.12167 17.144777 18.567785 17.850851 40 18.860408 40 13.624879 40 Length - 2010 rows In ()